If you search the Internet for the words “gladden the hearts of those” you will find numerous instances of a blessing based on the words of Swiss philosopher Henri Frédéric Amiel. I readily admit to having stolen it from The Rev. Elizabeth “Liddy” Hoster.
I added “and those you love” and have used it routinely. Congregations have been highly responsive to it, so much so that people ask for copies of the blessing.
One such is attached. Peace and blessings to you!